CircuitsToday is listing some free engineering mini projects that can be presented and designed by students for their exams. These mini projects are applicable for B-Tech/BE engineering students from various streams like Electronics and Instrumentation (EI), Electronics and Communication (ECE), Electrical Engineering (EEE), diploma and so on. Though the electronic circuits may look complex, they are explained in detail along with a circuit diagram, and are explained with links of all devices that are used in the circuit. Please note that these projects are meant for students, hobbyists and enthusiasts. If there are any doubts regarding the circuit, feel free to comment on the post. You can also bring in any modifications you want, and ask us if you have doubts. Furthermore, please go through the existing comments to get a better idea of the electronics mini project topics.

Top Electronics Projects for engineering students

This minor mini project is used to design a street light that brightens up when night falls and automatically turns OFF when day light comes in. In order to detect the amount of light that is needed to decide when to cut-off the circuit and later activate it is done with the help of a sensor called Light Dependent Resistor (LDR). The main principle used behind the LDR is that, the presence of light causes the resistance of the sensor to go low. You can modify he circuit by placing LED’s instead of the 230 volt lamp. To know more about it, check out the comments given in the circuit. The circuit is comparatively easy to design, and further modifications can be made according to your choice.

This is one of the most basic and best mini projects in electronics. A Silicon Controlled Rectifier (SCR) is used to rectify the AC mains voltage to charge the battery. The circuit consists of basic transistor switching methods and the components are cheap and are available in all electronics shops. A detailed description about the post is also given, which will give you a better idea.

This simple mini project is used to design an indicator to show the rate of air flow in a given space. The air flow is sensed with the help of an incandescent bulb filament. The variations due to the change of resistance in the bulb due to the air flow are given to the input of an LM339 operational amplifier. The circuit diagram and a better description of the circuit is given in the post above. Further modifications can be brought to the circuit and some of them are given in the comments section.

This circuit is used to produce an alarm output (bell or light), when the level of water rises above a certain level. This circuit uses a basic astable multivibrator made from a 555 timer IC. A resistance probe is set on a point at which the alarm is to set ON, as soon as the water rises up to that level. A detailed circuit can be seen in the post above. The number of components needed for this circuit is very less and can be easily assembled on a PCB.

This circuit can be used for detecting a fire and producing an alarm, thus alerting the people in the building where it is installed. A transistor sensor called BC177 is used to sense the heat produced due to the fire. A preset level can be kept for the transistor. As soon as the temperature rises above the set preset level, the leakage current of the transistor rises, thus driving the other transistors in the circuit. A relay is also used to switch the bell load as its output. The components needed for the circuit can be obtained easily and the circuit is easy to design.

This mini project is mainly meant for Btech EC students. An IC called TDA7000 is used for the purpose. The IC is integrated with a Frequency-Locked-Loop system with an intermediate frequency of 70 kHz. There have been many complaints that the IC is obsolete. Please check the comments to know the exact site to buy the IC. For more detailed explanation about the FM radio circuit, please check out the original post.

The project consists of a digital watch designed with the help of a 555 timer IC and 4-bit digit counter IC called IC MM&4C926, and also a 7 segment LED display. The circuit can be easily designed and assembled on a printed circuit board. Further instructions and detailed working can be obtained from the original post.

This circuit can not only be presented as your mini project, but can also be applied on your home electrical equipments to protect them from over voltage fluctuations. The circuit requires very simple components like a monostable multivibrator using a 555 timer, a few transistors, and some diodes, relays ad LED.

The detailed explanation is given in the post above, and if you wish you can easily modify the circuit to make it an automatic voltage stabilizer.

This circuit uses an LM 311 comparator IC and a light dependent resistor as its sensor. The output of the LDR is given to the inverting input of the comparator. The resistance remains high when there is no light and the resistance drops as soon as light falls on it. This lessens the voltage at the inverting input and thus the comparator produces a high output which turns a transistor and thus the relay on. A much more detailed working can be obtained from the original post.

This circuit can be used to escape from the nuisance of mobile phone rings when you are at home. This circuit will give a visual indication if placed near a mobile phone even if the ringer is deactivated.

Latest Electronics Mini Projects:-

This is a classic mini project for electronics engineering students. Developed using AT89S51 (a version of 8051 from Atmel) with a well explained circuit diagram and program. We have tested and verified this circuits functioning in our lab. The program is written in assembly language using the MCS-51 instruction set.

In this project, you can make a frequency counting device/system.We have developed this using Avr Atmega8 microcontroller. We have given the complete circuit diagram, software codes and other necessary information to make this project a reality. If you are not familiar with Avr Atmega8 controller, we have developed a complete tutorial to learn Avr from ground.

Note:- If you have any doubts, please ask in the comments section of the corresponding post

In this project, you can make a simple digital voltmeter application which can measure upto 5 volts (0 to 5 volts). The circuit is developed using ADC0804 and AT89S51 micro controller. The output is displayed using two 7 segment displays. The software is developed in assembly language.

im also a 3rd year ece student,i found a mini project on electronic attendence and door access by thumb print…it was made with 8051uc, intersting.but as ma guide wanted the project to be done with discreet components,i cant do it.as u hav to do your projct based on the same uc it seemed to me to give you this suggestion…Hope you find it helpful

i am a 3rd year student
i got a project that is i have to design a device such that it directly converts the data from usb port and send it to vga port of projector without using laptop.
please help me if anyone have relevant info.

Hai I’m bins t jose studying instrumentation & control engg.i would like to do a mini project without using microcontrollers.i would like to do medical electronic instrumentation based circuits.so please suggest me interesting projects.budjet below RS.7000/-

Gudmrg sir..i am priyadharshni.. i am studying ece third year..i want some circuits related to digital ics..i want some innovative circuit and also it should be new…plz help me with ur knowledge..thank you so much sir..

Hai, I am srujana studying diploma final year in E.C.E. branch. I would like to do a project work related to “SOLAR SYSTEMS”. ls my choice is right ? I am totally confused. please suggest me some good,new and interesting projects quickly.

i have mini project done with avr and zigbee.
having report and product with me
will give you for around 12000rs only.
street light system using zigbee and microcontroller.
it is latest topic.many functions are done with it.
i am in trivandrum.if u want any details contact me

sir i like to make current by using wifi or fm frequency . here i saw mobile incoming call indicator so i think it will be easy to make current/ (12v atleast ) .so please help me to do this .i jus got a circuit but i couldnt make current as i wanted

You will get current in the range of micro ampere by transmitting high power signal consuming lots of power??!!!. The project may look very interesting but not practically viable please. Please note the mobile call indicator uses it’s own power supply not taking the radiated power to show direct indication.

Hello. I am currently busy with my in-service training(final year) in Electronic engineering and I would like you to give me an idea of an electronic project that will benefit a company that manufactures electronic fuzes.

sir I am 3rd year degree student. I want to need a simple mini project and the material cost is minimum charge. related to electrical or electronics with circuit diagram but it should be effective and innovative.please send me a good one.

sir I am 2nd year EEE student. I want to need a simple mini project and the material cost is minimum charge. please send any mini project with related to electrical or electronics with circuit diagram.

as this mini projects has already done if i select this project and do whether it will b considered as my mini project or else it will b rejected??but i am not submiting tis as my main project just for gaining some knowledge i am working on tis mini project..

Thank you so much for providing this list of projects. It saved my time a lot. All the above mentioned projects are very interesting and useful for me. I have seen some more good electronics mini projects ideas in another page along with circuit diagram and detailed explanation. So, anybody interested to read, visit http://bit.ly/1ioHuHZ

Sir I want to make an automatic alarm device which is used in some colleges.so,please give information about circuit design and which apparatus is required for that and how to set timings in that alarm………….

hello i am a final year student of B.Tech i have to make a mini project this year but i’m quite clueless about my project topic .can u help me with this.plz inform me about project topics which are easy and innovative as well.help me as i don’t know from where to start with.

i want simple electronic project with diagram and procedure that how its working.
please give me information in brief to submit the project.
and it is not compulsory to give me info about only these only you will also provide me any type of simple electronic project.
please provide me mail to how to make a electronic project

I am looking for a simple inexpensive kit/module/project for an elapsed time counter that starts counting UP from zero in hours and minutes when I give it a high or low and stops counting and displays the elapsed time in hrs and mins when I remove the high/low or give it another pulse. The elapsed time could be as much as 4 or 5 hours.

Can you steer me to something that can be made to do this? My grandson (age 12) could build it but I do not speak any microcontroller software languages so can only go that route if it is pre-programed. Thanx.

sir i want mini project which that no one had seen.it should be low cost,compatible. plz send me list of some projects. i am related with e&tc branch. and i wntd projeect for third year diploma in e&tc.

Hi, sir can u give me the code either in assembly or C language for “Light Following/sensing Robot” and “wireless power transfer” using At89c51 microcontroller or tell me any other source plz i shall be greatful.

gooday,i’m an Electrical/electronics student and i am told to construct a 15volt input voltage amplifier using 555 timer interfaced with op-amp for my mini project. Can some one help me with the circuit diagram for such a combination?

1.I want to build a solar charging mobile phones but with a moderate solar panel(equal to size of mobile phone panels) & EFFECTIVE as well …please send me some idea’s and circuits to my email ID..?????????

Sir,
iam working in pvt company,i want one simple circuit.i using 24volt sensor. i sensing one object, after 3 counting(24volt) one output 24volt go to on coil.Pls revert me if any clarifications my mail : ss_baboo@yahoo.co.in

i am not getting the signals to tv antenna properly,
many times i am not getting good picture quality on my tv screen,
so please will you suggest any simple circuit for the signal booster which will boots the signals coming to antenna and i will get a better signals

sir,am 2nd year entc engineering student…….and i wanted to do the mini project….i had choose fm transmitter…..soo plz do me some help for this project….send me information about fm transmitter on my id……thanku…

sir..
I am in 3rd engineering. I want to make miniproject which i can carry forward for 4th year main project.
And also useful in electronic n tele com industry
pls suggest topics regarding this.
Can i do on vlsi..?

sir iam studying diploma 3rd sem & we have a convergence in our college ie., i want to do any thing that can impress every one wit my skills so pls help me im frm ece department… eagerly waiting ur reply ie., for ur project help…

sir.. Last time when i was in 4th sem i had used ur inverter circuit for my mni project, it was …. NOw i want some low budget project for final year foe deploma in electrical and electronics…plz let me know if you have

Pretty great doubt indeed!
You can interpret electronics as “using various number of components (of course electronic components) to modulate the flow of electrons needed for the particular application you are designing”

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